Bearing Diagnostics of Hydro Power Plants Using Wavelet Packet Transform and a Hidden Markov Model with Orbit Curves

Table 3

SNR comparison.

Harmonic	Frequency [Hz]	SNR before	SNR after
0	0	37.39	317.62
1	3.33	35.68	304.38
3	10	25.99	205.45
6	20	17.77	191.3
8	26.66	15.16	132.9